Photovoltaic power station group string abnormality alarm device

Abstract

The utility model relates to alarm device technical field, propose a kind of photovoltaic power station group string abnormal alarm device, including shell, the side fixedly connected with siren of shell, the inner wall of shell is provided with switch component, switch component includes the support of fixedly connected in the inner wall of shell, the top of support is rotatably connected with the rotating lever of pin shaft, the one end fixedly connected with iron block of rotating lever, the inner wall of shell is fixedly connected with the electromagnet of group electric connection with photovoltaic power station, electromagnet is mutually adsorbed with iron block under energized state, the other end fixedly connected with pressure block of rotating lever, the inner wall of shell is fixedly connected with the contact switch of electric connection with siren.The utility model realizes alarm using the physical characteristic change of electromagnet energization or power-off, need not complex circuit detection, avoid the risk of electronic component misjudgment.

Description

Technical Field

[0001] This utility model relates to the field of alarm device technology, specifically to an alarm device for abnormality of photovoltaic power station strings. Background Technology

[0002] As an important component of clean energy, the stable operation of photovoltaic power generation is crucial to the reliability of the energy system. Photovoltaic power plants are usually composed of multiple strings (photovoltaic modules connected in series). Any abnormality in any string (such as current interruption, voltage abnormality or insulation failure) may affect the overall power generation efficiency or even cause safety accidents. Therefore, real-time monitoring of string status and timely alarm are key links to ensure the safe and stable operation of photovoltaic power plants.

[0003] Currently, common photovoltaic string anomaly monitoring mostly relies on electronic sensors (such as current transformers and voltage detection modules) combined with microprocessors for data acquisition and logical judgment. This type of technical solution has the following limitations: First, electronic sensors are susceptible to environmental factors (such as temperature fluctuations and electromagnetic interference), which may lead to data acquisition deviations, resulting in false alarms or failure to identify real anomalies in a timely manner. Second, existing alarm devices typically require the integration of signal conditioning circuits, analog-to-digital conversion modules, and logic processing units, resulting in complex structures and high costs, while also increasing the potential for failure. Third, alarm devices are often installed outdoors or in enclosed electrical cabinets, which are prone to heat buildup during long-term operation. Existing equipment mostly relies on natural heat dissipation or fixed-direction fans, which have low heat dissipation efficiency. High temperatures may cause electronic components to degrade or malfunction.

[0004] In view of this, this utility model proposes a photovoltaic power station string abnormality alarm device. Utility Model Content

[0005] This invention proposes a photovoltaic power station string abnormality alarm device, which solves the problem that existing alarm devices rely on electronic sensors and are easily affected by the environment, leading to false alarms.

[0006] The technical solution of this utility model is as follows: A photovoltaic power station string abnormality alarm device includes a housing, an alarm fixedly connected to one side of the housing, a switch assembly provided on the inner wall of the housing, the switch assembly including a support fixedly connected to the inner wall of the housing, a rotating rod rotatably connected to the top of the support via a pin, an iron block fixedly connected to one end of the rotating rod, an electromagnet electrically connected to the photovoltaic power station string fixedly connected to the inner wall of the housing, the electromagnet attracting the iron block when energized, a pressure block fixedly connected to the other end of the rotating rod, and a contact switch electrically connected to the alarm fixedly connected to the inner wall of the housing.

[0007] Preferably, a torsion spring is sleeved on the pin of the rotating rod, and the two ends of the torsion spring are welded to the rotating rod and the support, respectively.

[0008] Preferably, a cooling fan is fixedly connected to the top of the housing, and an air duct is provided at the air outlet of the cooling fan. The air duct is fixedly connected to the inner side of the housing, and a plurality of air guide plates are rotatably connected to the inner side of the air duct and distributed at equal intervals along the length of the air duct. A drive mechanism is provided on the housing to drive the plurality of air guide plates to swing back and forth.

[0009] Preferably, the driving mechanism includes several sector gears fixedly connected to the top of the air guide plate, and slide rods penetrating the inner wall of the air duct are slidably connected to both ends of the air duct. A toothed plate is fixedly connected between two slide rods, and the several sector gears mesh with the toothed plate. A driving component for driving the slide rods to slide back and forth is provided on the inner side of the housing.

[0010] Preferably, the driving component includes a motor fixedly mounted on the top of the housing, the output shaft of the motor is fixedly connected to an eccentric wheel, the outer edge of the eccentric wheel is rotatably connected to a connecting rod, and the end of the connecting rod away from the eccentric wheel is hinged to a corresponding slide rod.

[0011] Preferably, the shell has several ventilation holes at both ends, and the array of ventilation holes is distributed on the side wall of the shell.

[0012] The beneficial effects of this utility model are as follows: 1. This utility model uses the adsorption effect between an electromagnet and an iron block as the core triggering mechanism. When the photovoltaic string is working normally, the electromagnet is energized to attract the iron block and maintain the balance of the rotating rod. When there is an abnormal power failure, the electromagnet loses its magnetism, the torsion spring drives the rotating rod to rotate, and the pressure block triggers the contact switch to alarm. This purely physical structure avoids the problem of false alarms caused by temperature and electromagnetic interference of electronic sensors, and significantly improves the accuracy of alarms.

[0013] 2. External airflow is introduced through a cooling fan and air duct, and the air guide plate controlled by the drive mechanism oscillates periodically to achieve uniform airflow coverage inside the casing, avoiding local overheating. Compared with traditional natural cooling or fixed-direction fans, the heat dissipation efficiency is significantly improved, effectively delaying the performance degradation of electronic components. Attached Figure Description

[0014] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0015] Figure 1 This is a schematic diagram of the structure of a photovoltaic power station string abnormality alarm device according to an embodiment of the present utility model; Figure 2 This is a schematic diagram of the internal structure of the shell in an embodiment of the present invention; Figure 3This is a schematic diagram of the structure of the switch assembly according to an embodiment of the present utility model; Figure 4 This is a schematic diagram of the drive mechanism according to an embodiment of the present utility model; Figure 5 This is a schematic diagram of the structure of the driving component according to an embodiment of the present utility model.

[0016] In the diagram: 1. Housing; 2. Alarm; 3. Cooling fan; 4. Air duct; 5. Air guide plate; 6. Drive mechanism; 61. Sector gear; 62. Slide rod; 63. Gear plate; 64. Drive component; 641. Motor; 642. Eccentric wheel; 643. Connecting rod; 7. Ventilation hole; 9. Switch assembly; 91. Support; 92. Rotating rod; 93. Iron block; 94. Electromagnet; 95. Pressure block; 96. Contact switch; 97. Torsion spring. Detailed Implementation

[0017] The technical solutions of this utility model will be clearly and completely described below with reference to the embodiments of this utility model. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this utility model.

[0018] like Figures 1 to 5 As shown, this embodiment proposes a photovoltaic power station string abnormality alarm device, including a housing 1, an alarm 2 fixedly connected to one side of the housing 1, a switch assembly 9 provided on the inner wall of the housing 1, the switch assembly 9 including a support 91 fixedly connected to the inner wall of the housing 1, a rotating rod 92 rotatably connected to the top of the support 91 via a pin, an iron block 93 fixedly connected to one end of the rotating rod 92, an electromagnet 94 electrically connected to the photovoltaic power station string fixedly connected to the inner wall of the housing 1, the electromagnet 94 attracting the iron block 93 when energized, a pressure block 95 fixedly connected to the other end of the rotating rod 92, a contact switch 96 electrically connected to the alarm 2 fixedly connected to the inner wall of the housing 1, a torsion spring 97 sleeved on the pin of the rotating rod 92, the two ends of the torsion spring 97 being welded to the rotating rod 92 and the support 91 respectively.

[0019] In this embodiment, when the photovoltaic power station string is working normally, the electromagnet 94 is continuously energized and generates a magnetic field, attracting the iron block 93. At this time, the rotating rod 92 overcomes the elastic force of the torsion spring 97 to maintain balance, the pressure block 95 moves away from the contact switch 96, and the alarm 2 is in the off state. When the photovoltaic string malfunctions (such as current interruption or voltage abnormality), the electromagnet 94 is de-energized and loses its magnetism. The elastic force of the torsion spring 97 pushes the rotating rod 92 to rotate around the pin shaft, causing the pressure block 95 to press down the contact switch 96, thereby triggering the alarm 2 to issue an alarm signal. The entire structure uses the physical characteristics of the electromagnet 94 being energized or de-energized to achieve alarm, without the need for complex circuit detection, avoiding the risk of misjudgment by electronic components. The torsion spring 97 provides constant elastic force to ensure that the alarm can still be reliably triggered when the electromagnet 94 fails, providing double protection for system safety.

[0020] In a further preferred embodiment of the present invention, a cooling fan 3 is fixedly connected to the top of the housing 1, and an air duct 4 is provided at the air outlet of the cooling fan 3. The air duct 4 is fixedly connected to the inner side of the housing 1, and a plurality of air guide plates 5 are rotatably connected to the inner side of the air duct 4 and are distributed at equal intervals along the length of the air duct 4. A drive mechanism 6 is provided on the housing 1 for driving the plurality of air guide plates 5 to swing back and forth.

[0021] In this embodiment, to prevent overheating inside the housing 1 from affecting the lifespan of the components, a cooling fan 3 is set to actively blow air into the housing 1, and at the same time, the drive mechanism 6 is activated to drive several air guide plates 5 to swing back and forth, so that the air guide plates 5 blow the external low-temperature airflow evenly into the housing 1 and cover all areas inside the housing 1, thus avoiding local overheating.

[0022] In a further preferred embodiment of this utility model, the drive mechanism 6 includes several sector gears 61 fixedly connected to the top of the air guide plate 5. Both ends of the air duct 4 are slidably connected to slide rods 62 that penetrate the inner wall of the air duct 4. A toothed plate 63 is fixedly connected between two slide rods 62. Several sector gears 61 mesh with the toothed plate 63. A drive member 64 for driving the slide rods 62 to slide back and forth is provided on the inner side of the housing 1. The drive member 64 includes a motor 641 fixedly installed on the top of the housing 1. An eccentric wheel 642 is fixedly connected to the output shaft of the motor 641. A connecting rod 643 is rotatably connected to the outer edge of the eccentric wheel 642. The end of the connecting rod 643 away from the eccentric wheel 642 is hinged to the corresponding slide rod 62. Several ventilation holes 7 are provided at both ends of the housing 1. Several ventilation holes 7 are arrayed on the side wall of the housing 1.

[0023] In this embodiment, the cooling fan 3 draws external air into the air duct 4. The drive mechanism 6 drives the eccentric wheel 642 to rotate via the motor 641, which in turn drives the slide bar 62 to reciprocate via the connecting rod 643. The slide bar 62 drives the toothed plate 63 to move, causing all the sector gears 61 to swing synchronously, thereby controlling the air guide plate 5 to periodically change its angle and achieve directional airflow for heat dissipation. This can greatly improve the heat dissipation effect inside the housing 1. The ventilation holes 7 on both sides of the housing 1 form air convection, which enhances the heat dissipation efficiency.

[0024] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A photovoltaic power station string abnormality alarm device comprising a housing (1), characterized in that, An alarm (2) is fixedly connected to one side of the housing (1). A switch assembly (9) is provided on the inner wall of the housing (1). The switch assembly (9) includes a support (91) fixedly connected to the inner wall of the housing (1). A rotating rod (92) is rotatably connected to the top of the support (91) via a pin. An iron block (93) is fixedly connected to one end of the rotating rod (92). An electromagnet (94) electrically connected to the photovoltaic power station group is fixedly connected to the inner wall of the housing (1). The electromagnet (94) attracts the iron block (93) when energized. A pressure block (95) is fixedly connected to the other end of the rotating rod (92). A contact switch (96) electrically connected to the alarm (2) is fixedly connected to the inner wall of the housing (1).

2. The abnormal alarm device for photovoltaic power station string according to claim 1, characterized in that, A torsion spring (97) is sleeved on the pin of the rotating rod (92), and the two ends of the torsion spring (97) are welded to the rotating rod (92) and the support (91) respectively.

3. The abnormal alarm device for photovoltaic power station string according to claim 2, characterized in that, A cooling fan (3) is fixedly connected to the top of the housing (1). The air outlet of the cooling fan (3) is provided with an air duct (4). The air duct (4) is fixedly connected to the inner side of the housing (1). Several air guide plates (5) are rotatably connected to the inner side of the air duct (4) and are distributed at equal intervals along the length of the air duct (4). A drive mechanism (6) is provided on the housing (1) to drive the several air guide plates (5) to swing back and forth.

4. The abnormal alarm device for photovoltaic power station string according to claim 3, characterized in that, The drive mechanism (6) includes several sector gears (61) fixedly connected to the top of the air guide plate (5). Both ends of the air duct (4) are slidably connected to slide rods (62) that penetrate the inner wall of the air duct (4). A toothed plate (63) is fixedly connected between two slide rods (62). Several sector gears (61) mesh with the toothed plate (63). The inner side of the housing (1) is provided with a drive member (64) for driving the slide rods (62) to slide back and forth.

5. The abnormal alarm device for photovoltaic power station string according to claim 4, characterized in that, The drive unit (64) includes a motor (641) fixedly mounted on the top of the housing (1). The output shaft of the motor (641) is fixedly connected to an eccentric wheel (642). The outer edge of the eccentric wheel (642) is rotatably connected to a connecting rod (643). The end of the connecting rod (643) away from the eccentric wheel (642) is hinged to a corresponding slide rod (62).

6. The abnormal alarm device for photovoltaic power station string according to claim 3, characterized in that, Both ends of the housing (1) are provided with a number of ventilation holes (7), and the number of ventilation holes (7) are arrayed on the side wall of the housing (1).

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